Brake-shoe.



G. W. ARMBBIIST. BRAKE SHOE.

APPLICATION FILED OCT. 14, 1910.

Patented Sept. 5,1911.

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BRAKE-SHOE Specification of Letters Patent.

Application filed October 14, 1910. Serial No. 586,990.

To all whom it may concern:

Be -it'known that I, CHARLES W. ARM- nni'is'r, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful- Improvements in B1flk8-Sl1OBS, of which the followingis a specification.

This invention relates to novel improvements in brake shoes and it can be embodied in shoes of the ordinary solid cast iron type or in the various forms of composite shoes which are now familiar in the art.

The object of the invention is to reinforce and strengthen a shoe in a simple and inexpensive manner to reduce the liability of the shoe fracturing in'handling and in service and to hold the parts together in case of fracture so that-the shoe may be continued in service. i

Withthese and other ends in view the invention contemplates the provision of strengthening means at or adjacent to the back ofthe'shoe and extending longitudinally thereofat or adjacent to the sides whereby the body of the shoe. is greatly strengthened and reinforced.

In the accompanying drawingsFigure 1 is a side view and Fig. 2 a back View showing one embodiment of my invention; Fig. 3 is a back View showing another embodimehtlof...

the invention. Fig. 4 is a back view and Fig. 5 a side viewshowing still another embodiment of the invention, the shoe being provided with integral spacing lugs. Fig. 6 is a side view and Fig. '2' a plan viewshowing another embodiment of the invention. Fig. 8 shows the invention embodied in a form sdn ewhat similar to that of Fig. 3

- l).t!l7 with the strengthening ribs constructed "to form spacing lugs. Fig. 9-1s -a transverse sectional view on the line 99 of Fig. 7. Fig. 10 1s a transverse sectlonal View on the elusive, show different forms of the inserted strengthening strips.

Referring to the drawings, 1 designates the body of the shoe which may be of the common solid cast iron type-or of any composite type with which my invention may be adapted, with or without such modifications as will readily occur to those skilledin the art for such adaptations.

I have, for purposes of illustration, shown the invention in its various forms embodied a car shoe of well-known type, but it will be distinctly understood that I do not thereby restrict myself to this particular embodiment for the invention may be employed with equally satisfactory results in car shoes of other types and in various forms of locomotive driver shoes.

Two reinforcing and strengthening strips 2 are embedded on edge in the shoe during the casting operation at or adjacent to-its back and at or adjacent to its sides. These strips extend longitudinally of the shoe, approximately from end to end thereof, the particular length being varied to meet different conditions and requirements. These strips may be embedded in the shoe at its sides, as shown in-Figs. l and 2, or between its sides, as indicated by 3 in Fig. 4.. The strips may be made of any suitable metal, such as steel, wrought iron or malleable iron, and they maybe variously constructed to unite and make locking engagement with the cast iron of the body. Forexample, they may be provided with longitudinal slots 5,.as shown in Fig. 1, or with "openings 6 and lips .7,'as shown in Fig. l1,.or with a plurality of openings 8, asshown in Fig. 12, or

with. recesses 9, as shown in Fig. 13, or the ends of the strips may be bent to form hooks 10, as shown in Fig. 14. Various other -means may be employed for effecting a lock ing engagement between the strips and the body of the shoe. The strips may be set in the shoe so that their outer edges will be guide lugs 18, as shown in Fig. 3, to accommodate the brake head, or they may be extended throughout the length of the shoe from one end lug 14. to the other, as shown at .in Fig. 8, and broadened at 16 adjaoent to the guide lugs 17, and at18 adjacent to the attaching lug 19 to form hear ing or spacing lugs for the brake head. I

may also embody the embedded'strips in a .shoe with spacing lugs 20, as shown in Figs.

5 thelatter figures the strips are made in a wavy or tortuous form, the ends 21 and the central portion 22 being depressed and the intermediate portions 23 elevated so that the latter portions will project more or less beyond the back of the body of the shoe, whereas the ends and central portions are buried in the body with their edges exposed or not as desired. I

The invention provides a simple means for: reinforcing and strengthening a brake shoe so that the liability of fracture is greatly reduced and thereby the longevity of the shoe is increased and the cost of maintenance is lowered. The embedded strips will also hold the parts of the shoe together in event of fracture and thereby enable the shoe to be continued in service besides avoiding the liability of accidents by preventing the broken portions of the shoe from falling upon the track where they may enter a switch or a frog and cause disaster.

What I claim and desire to secure by Letters Patent is:

j and strengthening means projecting outward from the back of the body of the shoe and extending longitudinally thereof at or adjacent to its sides and connected through- 5 out their length with the body of the shoe.

'2. A brake shoe comprising reinforcing and strengthening means connected throughout their length with the body of the shoe and projectmg outward from the back of the body of the shoe between the atcaching lug and the end lugs and extending longitudinally of the shoe at or adjacent to it sides.

3.'A brake shoe comprising a narrow strip extending on edge approximatel from end to end of the shoe parallel wit the side thereof and connected throughout its length with the bod of the shoe at or adjacent to its back an removed from the wearing face of the shoe.

4. A brake shoe comprising a narrow strip extending on edge approximately from end to end of the shoe and parallel with the side thereof at or adjacent to its back and projecting outwardly from the body of'the shoe between the attaching lug and the end lugs.

5. A brake shoe comprising a pair of nar row strips extending approximately from end to end of the shoe and embedded in the body of the shoe at or adjacent to its back and parallel with the sides thereof, said strips projecting outward from the back of the body of the shoe between the attaching lug and the end lugs and having means to 1. A brake shoe comprising reinforcing make locking engagement with the body of the shoe.

CHARLES W. ARMBRUST.

Witnesses:

WM. 0. BELT, M. A. Kmnm.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washing-toxifD. 0.

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